外研九年级下Module 4 Rules and suggestions Unit 3 Language in use (共36张PPT).ppt

①表示命令、禁止、不得不。 You must come in time. 否定回答, 不能用mustn’t (禁止, 不准)， 而用needn’t, don’t have to (不必)。 --Must we go now? --Yes, you must.  --No, you don’t have to / you needn’t. ①表示请求、建议等，would更委婉。 Will / Would you pass me the ball, please? ②表示意志、愿望和决心。 I will never do that again. They asked him if he would go abroad. 1.你必须马上回家。 You must go home now. 2.他一定吃过什么东西了。 He must have eaten something. 3.吃饭之前不能吃零食。 You mustn’t eat snacks before meals. 4. 我可以问你的名字吗？ May I ask your name? 5. 你能用英语说吗？ Can you speak in English? 6. 我们应该准时去上学。 We should go to school on time. 7. 你没有必要那么做。 You needn’t do that. * * * Module 4 Rules and suggestions Unit 3 Language in use To summarise and consolidate the use of modal verbs 2. To know more rules of eco-tourism Teaching Objectives 定义：表示可能、怀疑、允诺、愿望、义务、必要、猜测等的动词是情态动词。 语法特征　 1） 情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。　 2） 情态动词 除ought 和have 外，后面只能接不带to 的不定式。 3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。 4）情态动词没有非谓语形式，即没有不定式，分词，等形式。 常用情态动: can, could, may, might, must, need, shall, will, should, would… 1. You ____ be careful of falling stones. 2. You ______ (not) walk too close to the edge of the hill path because you ____ fall and hurt yourselves. 3. You _____ always wear proper clothes. 4. Bears _____ think our rubbish is food. 5. — ___ we go rock climbing? — No, you _____ (not). 6. You ______ (not) go off on your own. must mustn’t might should might Can can’t mustn’t 填入适当的情态动词 7. You ____ need some water. 8. We _____ hang the food in a tree tonight. 9. It ___ smell food from a long way away. 0. Bears _____ think our rubbish is food. 1. No one ___ run faster than a bear. 2. You ______ (not) make any sudden moves or make a sound. And above all, you ______ (not) run. may should can might can mustn’t mustn’t ①表示能力(体力, 知识, 技能), 常用情态动词 can和could表达。 Can you lift this heavy box? (体力) Mary